(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

¨

If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

On February 6, 2018, the Board of Directors (the “Board”) of Harmonic Inc. (the “Company”) elected David Krall to the Board, and a press release announcing the appointment was issued by the Company on February 12, 2018.

There is no arrangement or understanding between Mr. Krall and any other persons pursuant to which he was selected as a director. Mr. Krall has no direct or indirect material interest in any transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K. Mr. Krall and the Company have entered into the Company’s standard form of indemnification agreement, a copy of which has been filed as an exhibit to the Company’s Registration Statement on Form S-1 (File No. 33-90752).

Item 5.03 Amendment to Articles of Incorporation or Bylaws; Change in Fiscal Year

On February 6, 2018, the Board adopted an amendment to Article III, Section 3.2 of the Company’s bylaws (the “Bylaws”) to increase the number of directors of the Board from seven (7) to eight (8). Set forth below is the text of the revised Bylaw provision:

“3.2 NUMBER OF DIRECTORS

The board of directors shall consist of eight (8) members. The number of directors may be changed by an amendment to this bylaw, duly adopted by the board of directors or by the stockholders, or by a duly adopted amendment to the certificate of incorporation. No reduction of the authorized number of directors shall have the effect of removing any director before that director’s term of office expires. If for any cause, the directors shall not have been elected at an annual meeting, they may be elected as soon thereafter as convenient at a special meeting of the stockholders called for that purpose in the manner provided in these Bylaws.”

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.

Description

10.1*

Form of Indemnification Agreement

99.1

Press Release of Harmonic Inc. dated February 12, 2018

*

Incorporated by reference to Exhibit 10.1 filed with the Company’s Registration Statement on Form S-1 (File No. 33-90752).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

SAN JOSE, Calif. — February 12, 2018 — Harmonic (NASDAQ: HLIT), the worldwide leader in video delivery and cable access virtualization, today announced it has expanded the company’s board of directors with the appointment of David Krall.

“I’m delighted to welcome David to our board,” said Patrick Harshman, president and CEO of Harmonic. “David’s extensive executive leadership and board experience, and particularly his strong digital and streaming media background, make him an excellent addition. We look forward to David’s insights and guidance as we continue to transform the video and broadband industries with our OTT SaaS and virtualized cable access solutions.”

Mr. Krall currently serves as a strategic advisor to Roku, Inc., a leading manufacturer of media players for streaming entertainment, and on the board of directors of Progress Software Corp., Universal Audio, Inc. and Audinate Pty Ltd. Previously, he served as president and chief operating
officer of Roku. Earlier in his career, Mr. Krall served as president and chief executive officer of QSecure, Inc., a developer of secure credit card technology, and of Avid Technology, Inc., a provider of digital media creation tools for the media and entertainment industry.

“Harmonic is well positioned to drive a new phase of growth through its market-leading VOS™ OTT streaming and new CableOS™ virtualized cable access innovations. I am looking forward to helping the company deliver on its market leadership and shareholder value creation vision,” said Mr. Krall.

Mr. Krall holds a B.S. and M.S. in Electrical Engineering from the Massachusetts Institute of Technology and an MBA, with distinction, from Harvard Business School.

Further information about Harmonic is available at www.harmonicinc.com.

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About Harmonic

Harmonic (NASDAQ: HLIT), the worldwide leader in video delivery technology and services, enables media companies and service providers to deliver ultra-high-quality broadcast and OTT video services to consumers globally. The company has also revolutionized cable access networking via the industry’s first virtualized CCAP solution, enabling cable operators to more flexibly deploy gigabit internet service to consumers’ homes and mobile devices. Whether simplifying OTT video delivery via innovative cloud and software-as-a-service (SaaS) technologies, or powering the delivery of gigabit internet cable services, Harmonic is changing the way media companies and service providers monetize live and VOD content on every screen. More information is available at www.harmonicinc.com.

Harmonic, the Harmonic logo and other Harmonic marks are owned by Harmonic Inc. or its affiliates. All other trademarks referenced herein are the property of their respective owners.